Plate-chuck.



No. 746.284. PATENTED 13150.8, 1903.

J. W. .GARLBTON.

PLATE CHUCK.

. APPLICATION FILED 1-1113. 14. 1901.

H0 MODEL.

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UNIT D STATES Patented December 8, 1908.

PATENT OFF CE.

JOHN W. CARLETON, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE UNIONMANUFACTURING COMPANY, OF NEW BRITAIN, CON- NECTICUT.

PLATE-CHUCK.

SPECIFICATION forming part of Letters Patent No. 746,284, dated December8, 1903.

Application filed February 14, 1901. Serial No. 47,264. (No model.)

' To otZZ whom it may concern:

Be it known that I, J OHN'W. CARLETON, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inPlate-Chucks, of which the following is a specification.

My invention relates to improvements in plate-chucks; and the object ofmy improve ment is to provide this class of chucks with a drill-drivingdevice.

7 In the accompanying drawings, Figure l is a front or face view of mychuck. Fig. 2 is a side elevation of the same with a portion thereofshown in section on the line a; of Fig. 3. Fig. 3 is a rear elevation.Figs. stand 5 are rear elevations showing modifications.

The chuck as shown is formed with front and rear plates 6 7, three jaws8, and three screws sired lathe.

9, all of an ordinary construction. 'I call it a plate-chuck by reasonof its plate or disk like form, and by that term intend to include thevarious forms of universal chucks and chucks of like form havingindependentlyoperated jaws without regard to whether the chuck-body isformed of one or two plates. These chucks are generally provided with ashallow recess onthe back, as at 10, the same being intended to receivea flanged hub, to which the chuck is secured and by means of which hubthe chuck may be fitted to any de- Such a flanged hub is partiallyindicated by broken lines in Fig. 2.

I form a recess 11 in the bottom ofthe recess'10 on the back of thechuck, and in the said recess I secure a slotted disk 12 to receive theflattened shank of a drill to prevent the drill from slipping within thechuck-jaws in case the chuck should be used to drive a large drill, asis sometimes done. I secure the slotted disk 12, so as to necessitateits rotation with the chuck, by means of pins or screws 13, that extendthrough the disk and into the back of the chuck. The disk 12 may befitted closely to the recess 11, as shown in Figs. 2 and 3, in whichcase it is rigid and immovable in the back of the chuck.

In Fig. 4 I haveillustrated the slotted disk 1 12 as of a diameterslightly smaller than that of the recess 11 and with the holes let forthe pins or screws 13 as elongated in a direction transversely to theslot 15, that receives the flattened portion of the drill. If the said'flattened portion is of less width than the length of the slot 15, itwill-allow for some variation in the direction of the'length of the saidslot in seating the drill in the chuck in of the said pins or screws 13or 13 is to serve as means for necessitating the rotation of the driverwith the chuck. After the flanged hub (shown by broken lines in Fig. 2)is secured to the chuck the slotted disk cannot be displaced, even ifthe pins or screws are headless, as at 13, Fig. 4.

In Fig. 5 I have shown substantially the same form of rigid driver as inFigs. 2 and 3, only instead of a slotted disk I have employed twopartial disks 12 securedin the same recess 12 by means of the pins orscrews 13, the space l5 between the said two partial disks being theequivalent of the slot 15, and therefore the said two partial disks l2are the equivalent of the slotted disk 12.

In each form of my improvement the chuck is of the ordinary plate-likeform adapted especially for use on engine-lathes. The disklike driver isinthe back partof the chuck, leaving the central opening in the chuck infront of the driver and back of thejaws perfectly free and unobstructedfor nearly the full thickness of the chuck. When desired to use thechuck in connection with a hollow mandrel, so that a round bar or shaftmay be extended into the mandrel, the slotted disk may be readilyremoved by taking ofi the flanged hub and readily replaced again whendesired.

I claim as my invention' 1. A plate-chuck having h0lding-jaws 0n itsfront face, a slotted drill-driver at its back v and a free andunobstructed opening forwork to enter between the back of the said'jawsand in front of the said driver, substantially as described.

IOO

2. A plate-chuck having in its back face the shallow recess 10 toreceive a flanged hub by which the chuck is mounted, a second shallowcircular recess 11 of a smaller diameter in the bottom of the recess 10,a thin disk-like drill-driver seated in said second recess and drivingpins or screws extending forwardly through the said drill-driver intothe back of the chuck, for necessitating the rotation of the said driverwith the said back of the chuck, to substantially as described.

JOHN W. OARLETO N. Witnesses:

JAMES SHEPARD, B. O. WOODFORD.

